IMPURITIES IN TDEV WITH AND WITHOUT CONDITIONING BY TRIMETHYLBORON HELIUM GLOW-DISCHARGE

被引：7

作者：

TERREAULT, B ^{[1
]}

BOUCHER, C ^{[1
]}

DECOSTE, R ^{[1
]}

ESSER, HG ^{[1
]}

GREGORY, BC ^{[1
]}

HADDAD, E ^{[1
]}

LIUHINZ, C ^{[1
]}

MAI, HH ^{[1
]}

ROSS, GG ^{[1
]}

SARKISSIAN, A ^{[1
]}

STANSFIELD, BL ^{[1
]}

MICHAUD, D ^{[1
]}

BROOKER, P ^{[1
]}

COTE, A ^{[1
]}

PINSONNEAULT, D ^{[1
]}

QUIRION, B ^{[1
]}

RATEL, G ^{[1
]}

RICHARD, N ^{[1
]}

THERIAULT, D ^{[1
]}

机构：

[1] CTR CANADIEN FUS MAGNET,VARENNES J3X 1S1,PQ,CANADA

来源：

JOURNAL OF NUCLEAR MATERIALS | 1993年 / 200卷 / 01期

基金：

加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1016/0022-3115(93)90008-M

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Boronisation by glow discharge with 30% B(CH3)3 in He was applied in the TdeV tokamak. Plasma current and density scans were performed before and after the process; the impurity influxes (visible spectroscopy and mass spectrometry), the plasma contamination (VUV spectroscopy and effective ion charge Z(eff)) and the radiated power P(rad) were measured. The density limit was investigated. The lifetime of the conditioning effect was correlated with surface analysis of wall samples. Without boronisation, Z(eff), P(rad) and a large fraction of the particle recycling were determined by oxygen from the residual gas. The density limit was (3.5-4.0) x 10(19) m-3 and a shrinkage of the plasma radius occurred at low current and high density. With boronisation, oxygen is reduced several fold, and (Z(eff)-1) and P(rad) are reduced by approximately 60%. Also, plasma shrinkage is eliminated and the density limit is increased to approximately 5 x 10(19) m-3. The lifetime of the effect seems to be mostly determined by saturation of the boron layer by oxygen.

引用

页码：50 / 58

页数：9

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